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6. Write the equation of three lines that are
(1) parallel to the X-axis
(i) parallel to the Y-axis.
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(1) Let P (x,y) be any point on the x-axis. Then clearly, for all position of P we shall the same ordinate 0 or, y = 0. Therefore, the equation of x-axis is y = 0. If a straight line is parallel and below to x-axis at a distance b, then its equation is y = -b.
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